New Zealand Plant Protection 58 (2005): 101-105
Copper and streptomycin resistance in bacterial strains isolated from stone fruit orchards in New Zealand
J.L Vanneste, G.E McLaren, J. Yu, D.A. Conzish and R. Boyd
ABSTRACT
Stone fruit orchards in New Zealand are sprayed with copper-based compounds and streptomycin to control bacterial diseases such as bacterial blast (Pseudomonas syringae pv. syringae) and bacterial spot (Xanthomonas arboricola pv. pruni). About 50% of the bacteria isolated from nectarines from the orchard at Clyde Research Centre, Central Otago, in September 2003, were found to be resistant to copper. The percentage of strains of P. syringae pv. syringae isolated in 2004 from nectarines from the same orchard that were resistant to 500 mg/litre of copper was 58%. This percentage rose to 92% seven days after treating the trees with copper. In 35 of the 48 samples from commercial stone fruit orchards tested, more than half of the bacteria isolated were resistant to 500 mg/litre of copper. Only five strains of Xanthomonas sp. out of the 306 strains tested were resistant to copper; none were resistant to streptomycin.
Keywords: Pseudomonas syringae, Xanthomonas arboricola pv pruni, Pseudomonas fluorescens, Pantoea agglomerans.
 | Isolation of copper and streptomycin resistant phytopathogenic Pseudomonas syringae from lakes and rivers in the central North Island of New Zealand J.L. Vanneste, D.A. Cornish, J. Yu, R.J. Boyd and C.E. Morris (2008) New Zealand Plant Protection 61: 80-85 |
| Sulphur as an alternative to copper for the control of bacterial blast on nectarine fruit G.E. McLaren, J.L. Vanneste and R.R. Marshall (2005) New Zealand Plant Protection 58: 96-100 |
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